Speaker：Enhui Shi（Suzhou University）

Time：2022-12-21, 14:30

Location：Tencent Meeting ID：668-393-306（No Password）

Abstract:

We establish two rigidity theorems for non-left-orderable group actions on dendrites. Explicitly, letting X be a dendrite without infinite order points, we show that if G is a non-virtually-left-orderable small group, then no G-action on X is almost free;  and if G is a higher rank lattice, then every G-action on X is a highly proximal extension of an almost finite action. This is a joint work with Hui Xu.